The recommended power-up sequence is to first power up the analog power supply (VCC), followed by the digital power supply (VDD), and then the clock signal (MCLK). This sequence helps to prevent any unwanted noise or oscillations during startup.
To optimize the AK4499EXEQ's performance for low-power operation, it is recommended to use the device's built-in power-down modes, reduce the clock frequency, and adjust the analog power supply voltage. Additionally, using a high-impedance headphone load and minimizing the output voltage swing can also help reduce power consumption.
The maximum allowed capacitance for the analog output filters is 100nF. Exceeding this value may cause stability issues or affect the device's performance.
The AK4499EXEQ's digital output data format is 24-bit, 2's complement, MSB-first. The device outputs data in a serial format, with the left and right channel data multiplexed on a single output pin. The user must ensure that the receiving device is configured to accept this data format.
It is recommended to keep the analog and digital signal traces separate and away from each other to minimize noise coupling. The analog signal traces should be routed close to the ground plane, and the digital signal traces should be routed close to the power plane. Additionally, using a ground plane and power plane split is recommended to reduce noise and improve performance.
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AK4499EXEQ Overview
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